Php Symfony 2原则：固定装置：加载未定义索引

我最近一直在使用Symfony2，我一直遵循本教程：

不幸的是，由于该教程是很久以前编写的，所以很多事情都是错误的。通过运用常识，我已经能够解决大部分问题，但这一点很棘手

我正在创建一个博客，并且有博客文章的数据装置，以及这些博客文章的评论。当我跑步时：

php app/console doctrine:fixtures load

我得到：

PHP Notice:  Undefined index: blog-1 in /private_html/symfony/symblog/vendor/doctrine/data-fixtures/lib/Doctrine/Common/DataFixtures/ReferenceRepository.php on line 154

以下是我的博客：

<?php
// src/Blogger/BlogBundle/DataFixtures/ORM/BlogFixtures.php

namespace Blogger\BlogBundle\DataFixtures\ORM;

use Doctrine\Common\DataFixtures\AbstractFixture;
use Doctrine\Common\DataFixtures\OrderedFixtureInterface;
use Doctrine\Common\Persistence\ObjectManager;
use Blogger\BlogBundle\Entity\Blog;

class BlogFixtures implements OrderedFixtureInterface
{
    /**
     * {@inheritDoc}
     */
    public function load(ObjectManager $manager)
    {
        $blog1 = new Blog();
        $blog1->setTitle('A day with Symfony2');
        $blog1->setBlog('Lorem ipsum dolor sit amet, consectetur adipiscing eletra electrify denim vel ports.\nLorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi ut velocity magna. Etiam vehicula nunc non leo hendrerit commodo. Vestibulum vulputate mauris eget erat congue dapibus imperdiet justo scelerisque. Nulla consectetur tempus nisl vitae viverra. Cras el mauris eget erat congue dapibus imperdiet justo scelerisque. Nulla consectetur tempus nisl vitae viverra. Cras elementum molestie vestibulum. Morbi id quam nisl. Praesent hendrerit, orci sed elementum lobortis, justo mauris lacinia libero, non facilisis purus ipsum non mi. Aliquam sollicitudin, augue id vestibulum iaculis, sem lectus convallis nunc, vel scelerisque lorem tortor ac nunc. Donec pharetra eleifend enim vel porta.');
        $blog1->setImage('beach.jpg');
        $blog1->setAuthor('Parth Sarin');
        $blog1->setTags('symfony2, php, paradise, symblog');
        $blog1->setCreated(new \DateTime());
        $blog1->setUpdated($blog1->getCreated());
        $manager->persist($blog1);

        $blog2 = new Blog();
        $blog2->setTitle('The pool on the roof must have a leak');
        $blog2->setBlog('Vestibulum vulputate mauris eget erat congue dapibus imperdiet justo scelerisque. Na. Cras elementum molestie vestibulum. Morbi id quam nisl. Praesent hendrerit, orci sed elementum lobortis.');
        $blog2->setImage('pool_leak.jpg');
        $blog2->setAuthor('Zero Cool');
        $blog2->setTags('pool, leaky, hacked, movie, hacking, symblog');
        $blog2->setCreated(new \DateTime("2011-07-23 06:12:33"));
        $blog2->setUpdated($blog2->getCreated());
        $manager->persist($blog2);

        $blog3 = new Blog();
        $blog3->setTitle('Misdirection. What the eyes see and the ears hear, the mind believes');
        $blog3->setBlog('Lorem ipsumvehicula nunc non leo hendrerit commodo. Vestibulum vulputate mauris eget erat congue dapibus imperdiet justo scelerisque.');
        $blog3->setImage('misdirection.jpg');
        $blog3->setAuthor('Gabriel');
        $blog3->setTags('misdirection, magic, movie, hacking, symblog');
        $blog3->setCreated(new \DateTime("2011-07-16 16:14:06"));
        $blog3->setUpdated($blog3->getCreated());
        $manager->persist($blog3);

        $blog4 = new Blog();
        $blog4->setTitle('The grid - A digital frontier');
        $blog4->setBlog('Lorem commodo. Vestibulum vulputate mauris eget erat congue dapibus imperdiet justo scelerisque. Nulla consectetur tempus nisl vitae viverra.');
        $blog4->setImage('the_grid.jpg');
        $blog4->setAuthor('Kevin Flynn');
        $blog4->setTags('grid, daftpunk, movie, symblog');
        $blog4->setCreated(new \DateTime("2011-06-02 18:54:12"));
        $blog4->setUpdated($blog4->getCreated());
        $manager->persist($blog4);

        $blog5 = new Blog();
        $blog5->setTitle('You\'re either a one or a zero. Alive or dead');
        $blog5->setBlog('Lorem ipsum dolor sit amet, consectetur adipiscing elittibulum vulputate mauris eget erat congue dapibus imperdiet justo scelerisque.');
        $blog5->setImage('one_or_zero.jpg');
        $blog5->setAuthor('Gary Winston');
        $blog5->setTags('binary, one, zero, alive, dead, !trusting, movie, symblog');
        $blog5->setCreated(new \DateTime("2011-04-25 15:34:18"));
        $blog5->setUpdated($blog5->getCreated());
        $manager->persist($blog5);

        $manager->flush();

        $this->addReference('blog-1', $blog1);
        $this->addReference('blog-2', $blog2);
        $this->addReference('blog-3', $blog3);
        $this->addReference('blog-4', $blog4);
        $this->addReference('blog-5', $blog5);
    }

    /**
     * {@inheritDoc}
     */
    public function getOrder() {
        return 1;
    }
}

---

Extend
AbstractFixture
在
blogixture
类中：

class BlogFixtures  extends AbstractFixture implements OrderedFixtureInterface{ ... }

文件：